Page 170 - Fluid Mechanics and Thermodynamics of Turbomachinery

Axial-flow Compressors and Fans 151

FIG. 5.8. Traverse measurements obtained from a 12-stage compressor (Smith 1970).
(Courtesy of the Elsevier Publishing Co).

FIG. 5.9. Mean work done factor in compressors (Howell and Bonham 1950). (Courtesy
of the Institution of Mechanical Engineers).

velocity distributions through a twelve-stage axial compressor, Figure 5.8(a). This
does illustrate that rapid changes in velocity distribution still occur in the first few
stages, but that the profile settles down to a fairly constant shape thereafter. This
phenomenon has been referred to as ultimate steady flow.
Smith also provided curves of the spanwise variation in total temperature,
Figure 5.8(b), which shows the way losses increase from midpassage towards